Question

Find an equation for the nth term of the arithmetic sequence.

a19 = -58, a21 = -164

an = 896 - 53(n - 2)
an = 896 - 53(n - 1)
an = 896 + 53(n + 1)
an = 896 - 53(n + 1)

Answer 1

@peachpi

Answer 2

now you have to find a1 and d.
d is like slope, and you can think of the numbers as points, so use something like the slope equation